chore(deps): update dependency cert-manager to v1.19.4 (#6332)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

Makefile

@@ -50,7 +50,7 @@ CILIUM_VERSION = v1.18.6
 CILIUM_IMAGE_REPO = quay.io/cilium
 
 # renovate: datasource=github-releases depName=cert-manager packageName=cert-manager/cert-manager
-CERT_MANAGER_VERSION = v1.19.3
+CERT_MANAGER_VERSION = v1.19.4
 CERT_MANAGER_CONTROLLER = quay.io/jetstack/cert-manager-controller:$(CERT_MANAGER_VERSION)
 CERT_MANAGER_CAINJECTOR = quay.io/jetstack/cert-manager-cainjector:$(CERT_MANAGER_VERSION)
 CERT_MANAGER_WEBHOOK = quay.io/jetstack/cert-manager-webhook:$(CERT_MANAGER_VERSION)